Dihydroquinine
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This article is compiled based on the United States Pharmacopeia (USP) – 2025 Edition
Issued and maintained by the United States Pharmacopeial Convention (USP)
(Hydroquinine), C20H26N2O2 326.43 CAS RN: 522-66-7.—Freely soluble in acetone, in alcohol, and in chloroform; almost insoluble in water.
Assay
Mobile phase: Prepare a mixture of water, acetonitrile, diethylamine, and methanesulfonic acid (860:100:20:20) and methanol (82:18).
Procedure: Inject about 20 μL into a suitable liquid chromatograph (see Chromatography 〈621〉) equipped with a 235-nm detector and a 4.6-mm × 15-cm column that contains packing L1. The flow rate is about 1.5 mL per minute. The area of the C20H26N2O2 peak is not less than 97.5% of the total peak area.
